console.log(
    "1234" + 1,
    "1234"[0] + 1,
    "1234"[6 - 5] + 1,
    ("12" + "34")[0] + 1,
    ("12" + "34")[6 - 5] + 1,
    [1, 2, 3, 4].join("")[0] + 1
);
